Parametric M12 Screw and Nut

This is the parametric version of the Hex Screw and Nut from “my” screw toys for kids (upload with more parts and the screw drivers will follow soon).

Print Settings:

• Layer hight: 0.2mm (otherwise the threads might bind)
• Supports: No
• Orientation: Screw-head on the print-bed.
• Print the Nut and Screw separtley 

I added the F3D File and the STEP File also one sample M3F.
Here is a drawing showing what the most important parameters will do.